Simple Definition of dilate
: to become larger or wider
Full Definition of dilate
Examples of dilate
The drug causes the blood vessels to dilate.
During labor, a woman's cervix will dilate to about 10 centimeters.
The drug dilates the blood vessels.
Origin of dilate
Middle English, from Middle French dilater, from Latin dilatare, literally, to spread wide, from dis- + latus wide — more at latitude
First Known Use: 14th century
Synonym Discussion of dilate
Medical Definition of dilate
: to enlarge, stretch, or cause to expand <dilate his pupils with atropine> <the drug dilates peripheral arteries>
: to become expanded or swollen <the cervix was dilating> <the pupils dilated>
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